Finding the Fourth Proportional to 105,049.69, 144,968.05 and 57,302.62

Step by Step Solution

1. Step 1: Write the proportion equation
   105,049.69 : 144,968.05 = 57,302.62 : x
2. Step 2: Convert to fraction form
   105,049.69/144,968.05 = 57,302.62/x
3. Step 3: Cross multiply
   105,049.69x = 144,968.05 × 57,302.62
4. Step 4: Simplify right side
   105,049.69x = 8,307,049,081.29
5. Step 5: Solve for x
   x = 8,307,049,081.29/105,049.69
6. Step 6: Final answer
   x = 79,077.33